Pileus Git - grits/blob - src/aweather-gui.c

   1 /*
   2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <config.h>
  19 #include <gtk/gtk.h>
  20 #include <gtk/gtkgl.h>
  21 #include <gdk/gdkkeysyms.h>
  22 #include <GL/gl.h>
  23 #include <GL/glu.h>
  24 #include <math.h>
  25
  26 #include "aweather-gui.h"
  27 #include "aweather-view.h"
  28 #include "location.h"
  29
  30 /*************
  31  * callbacks *
  32  *************/
  33 gboolean on_window_key_press_event(GtkWidget *widget, GdkEventKey *event, gpointer data)
  34 {
  35         if (event->keyval == GDK_q)
  36                 gtk_main_quit();
  37         return TRUE;
  38 }
  39
  40 void on_refresh(GtkToolButton *button, AWeatherGui *gui)
  41 {
  42         AWeatherView *view = aweather_gui_get_view(gui);
  43         aweather_view_refresh(view);
  44 }
  45
  46 void on_zoomin(GtkToolButton *button, AWeatherGui *gui)
  47 {
  48         AWeatherView *view = aweather_gui_get_view(gui);
  49         aweather_view_zoomin(view);
  50 }
  51
  52 void on_zoomout(GtkToolButton *button, AWeatherGui *gui)
  53 {
  54         AWeatherView *view = aweather_gui_get_view(gui);
  55         aweather_view_zoomout(view);
  56 }
  57
  58 void on_site_changed(GtkComboBox *combo, AWeatherGui *gui)
  59 {
  60         gchar *site;
  61         GtkTreeIter iter;
  62         GtkTreeModel *model = gtk_combo_box_get_model(combo);
  63         gtk_combo_box_get_active_iter(combo, &iter);
  64         gtk_tree_model_get(model, &iter, 1, &site, -1);
  65         AWeatherView *view = aweather_gui_get_view(gui);
  66         aweather_view_set_location(view, site);
  67         g_free(site);
  68 }
  69
  70 void on_time_changed(GtkTreeView *view, GtkTreePath *path,
  71                 GtkTreeViewColumn *column, AWeatherGui *gui)
  72 {
  73         gchar *time;
  74         GtkTreeIter iter;
  75         GtkTreeModel *model = gtk_tree_view_get_model(view);
  76         gtk_tree_model_get_iter(model, &iter, path);
  77         gtk_tree_model_get(model, &iter, 0, &time, -1);
  78         AWeatherView *aview = aweather_gui_get_view(gui);
  79         aweather_view_set_time(aview, time);
  80         g_free(time);
  81 }
  82
  83 static gboolean on_map(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
  84 {
  85         //g_message("map:map");
  86         AWeatherView *view = aweather_gui_get_view(gui);
  87         aweather_view_set_location(view, "IND");
  88
  89         /* Misc */
  90         glEnable(GL_BLEND);
  91         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  92         glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
  93
  94         /* Tessellation, "finding intersecting triangles" */
  95         /* http://research.microsoft.com/pubs/70307/tr-2006-81.pdf */
  96         /* http://www.opengl.org/wiki/Alpha_Blending */
  97         glAlphaFunc(GL_GREATER,0.1);
  98         glEnable(GL_ALPHA_TEST);
  99
 100         /* Depth test */
 101         glClearDepth(1.0);
 102         glDepthFunc(GL_LEQUAL);
 103         glEnable(GL_DEPTH_TEST);
 104
 105         aweather_gui_gl_end(gui);
 106         return FALSE;
 107 }
 108
 109 static gboolean on_configure(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
 110 {
 111         aweather_gui_gl_begin(gui);
 112
 113         double width  = da->allocation.width;
 114         double height = da->allocation.height;
 115         double dist   = 500*1000; // 500 km
 116         double cam    = 300*1000; // 500 km
 117
 118         glViewport(0, 0, width, height);
 119
 120         /* Perspective */
 121         glMatrixMode(GL_PROJECTION);
 122         glLoadIdentity();
 123         double rad = atan(height/2*1000.0/dist); // 1px = 1000 meters
 124         double deg = (rad*180)/M_PI;
 125         gluPerspective(deg*2, width/height, cam-20, cam+20);
 126
 127         /* Camera position? */
 128         glMatrixMode(GL_MODELVIEW);
 129         glLoadIdentity();
 130         glTranslatef(0.0, 0.0, -cam);
 131         //glRotatef(-45, 1, 0, 0);
 132
 133         aweather_gui_gl_end(gui);
 134         return FALSE;
 135 }
 136
 137 static gboolean on_expose_begin(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 138 {
 139         aweather_gui_gl_begin(gui);
 140         return FALSE;
 141 }
 142 static gboolean on_expose_end(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 143 {
 144         g_message("aweather:espose_end\n");
 145         aweather_gui_gl_end(gui);
 146         aweather_gui_gl_flush(gui);
 147         return FALSE;
 148 }
 149
 150 /* TODO: replace the code in these with `gtk_tree_model_find' utility */
 151 static void update_time_widget(AWeatherView *view, char *time, AWeatherGui *gui)
 152 {
 153         g_message("updating time widget");
 154         GtkTreeView  *tview = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 155         GtkTreeModel *model = GTK_TREE_MODEL(gtk_tree_view_get_model(tview));
 156         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 157                 char *text;
 158                 GtkTreeIter iter;
 159                 gtk_tree_model_iter_nth_child(model, &iter, NULL, i);
 160                 gtk_tree_model_get(model, &iter, 0, &text, -1);
 161                 if (g_str_equal(text, time)) {
 162                         GtkTreePath *path = gtk_tree_model_get_path(model, &iter);
 163                         g_signal_handlers_block_by_func(tview,
 164                                         G_CALLBACK(on_site_changed), gui);
 165                         gtk_tree_view_set_cursor(tview, path, NULL, FALSE);
 166                         g_signal_handlers_unblock_by_func(tview,
 167                                         G_CALLBACK(on_site_changed), gui);
 168                         gtk_tree_path_free(path);
 169                         g_free(text);
 170                         return;
 171                 }
 172                 g_free(text);
 173         }
 174 }
 175 static void update_location_widget(AWeatherView *view, char *location, AWeatherGui *gui)
 176 {
 177         g_message("updating location widget to %s", location);
 178         GtkComboBox  *combo = GTK_COMBO_BOX(aweather_gui_get_widget(gui, "site"));
 179         GtkTreeModel *model = GTK_TREE_MODEL(gtk_combo_box_get_model(combo));
 180         for (int i = 0; i < gtk_tree_model_iter_n_children(model, NULL); i++) {
 181                 GtkTreeIter iter1;
 182                 gtk_tree_model_iter_nth_child(model, &iter1, NULL, i);
 183                 for (int i = 0; i < gtk_tree_model_iter_n_children(model, &iter1); i++) {
 184                         GtkTreeIter iter2;
 185                         gtk_tree_model_iter_nth_child(model, &iter2, &iter1, i);
 186                         char *text;
 187                         gtk_tree_model_get(model, &iter2, 1, &text, -1);
 188                         if (g_str_equal(text, location)) {
 189                                 g_signal_handlers_block_by_func(combo,
 190                                                 G_CALLBACK(on_site_changed), gui);
 191                                 gtk_combo_box_set_active_iter(combo, &iter2);
 192                                 g_signal_handlers_unblock_by_func(combo,
 193                                                 G_CALLBACK(on_site_changed), gui);
 194                                 g_free(text);
 195                                 return;
 196                         }
 197                         g_free(text);
 198                 }
 199         }
 200 }
 201
 202 /*****************
 203  * Setup helpers *
 204  *****************/
 205 static void combo_sensitive(GtkCellLayout *cell_layout, GtkCellRenderer *cell,
 206                 GtkTreeModel *tree_model, GtkTreeIter *iter, gpointer data)
 207 {
 208         gboolean sensitive = !gtk_tree_model_iter_has_child(tree_model, iter);
 209         g_object_set(cell, "sensitive", sensitive, NULL);
 210 }
 211
 212 static void site_setup(AWeatherGui *gui)
 213 {
 214         GtkTreeIter state, city;
 215         GtkTreeStore *store = gtk_tree_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
 216         for (int i = 0; cities[i].label; i++) {
 217                 if (cities[i].type == LOCATION_STATE) {
 218                         gtk_tree_store_append(store, &state, NULL);
 219                         gtk_tree_store_set   (store, &state, 0, cities[i].label,
 220                                                              1, cities[i].code,  -1);
 221                 } else {
 222                         gtk_tree_store_append(store, &city, &state);
 223                         gtk_tree_store_set   (store, &city, 0, cities[i].label,
 224                                                             1, cities[i].code,  -1);
 225                 }
 226         }
 227
 228         GtkWidget       *combo    = aweather_gui_get_widget(gui, "site");
 229         GtkCellRenderer *renderer = gtk_cell_renderer_text_new();
 230         gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(combo), renderer, FALSE);
 231         gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(combo), renderer, "text", 0, NULL);
 232         gtk_combo_box_set_model(GTK_COMBO_BOX(combo), GTK_TREE_MODEL(store));
 233         gtk_cell_layout_set_cell_data_func(GTK_CELL_LAYOUT(combo), renderer,
 234                         combo_sensitive, NULL, NULL);
 235         g_object_unref(renderer);
 236         g_object_unref(store);
 237
 238         g_signal_connect(combo, "changed", G_CALLBACK(on_site_changed),  gui);
 239         AWeatherView *aview = aweather_gui_get_view(gui);
 240         g_signal_connect(aview, "location-changed", G_CALLBACK(update_location_widget), gui);
 241 }
 242
 243 static void time_setup(AWeatherGui *gui)
 244 {
 245         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 246         GtkTreeModel *store  = GTK_TREE_MODEL(gtk_list_store_new(1, G_TYPE_STRING));
 247         gtk_tree_view_set_model(tview, store);
 248
 249         GtkCellRenderer   *rend = gtk_cell_renderer_text_new();
 250         GtkTreeViewColumn *col  = gtk_tree_view_column_new_with_attributes(
 251                                         "Time", rend, "text", 0, NULL);
 252         gtk_tree_view_append_column(tview, col);
 253
 254         g_signal_connect(tview, "row-activated", G_CALLBACK(on_time_changed), gui);
 255         AWeatherView *aview = aweather_gui_get_view(gui);
 256         g_signal_connect(aview, "time-changed", G_CALLBACK(update_time_widget), gui);
 257 }
 258
 259 static void opengl_setup(AWeatherGui *gui)
 260 {
 261         GtkDrawingArea *drawing = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 262
 263         GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(
 264                         GDK_GL_MODE_RGBA   | GDK_GL_MODE_DEPTH |
 265                         GDK_GL_MODE_DOUBLE | GDK_GL_MODE_ALPHA);
 266         if (!glconfig)
 267                 g_error("Failed to create glconfig");
 268         if (!gtk_widget_set_gl_capability(GTK_WIDGET(drawing),
 269                                 glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE))
 270                 g_error("GL lacks required capabilities");
 271
 272         /* Set up OpenGL Stuff */
 273         g_signal_connect      (drawing, "map-event",       G_CALLBACK(on_map),          gui);
 274         g_signal_connect      (drawing, "configure-event", G_CALLBACK(on_configure),    gui);
 275         g_signal_connect      (drawing, "expose-event",    G_CALLBACK(on_expose_begin), gui);
 276         g_signal_connect_after(drawing, "expose-event",    G_CALLBACK(on_expose_end),   gui);
 277 }
 278
 279 static void toolbar_setup(AWeatherGui *gui)
 280 {
 281         GtkWidget *refresh = aweather_gui_get_widget(gui, "refresh_button");
 282         GtkWidget *zoomin  = aweather_gui_get_widget(gui, "zoomin_button");
 283         GtkWidget *zoomout = aweather_gui_get_widget(gui, "zoomout_button");
 284         g_signal_connect(refresh, "clicked", G_CALLBACK(on_refresh), gui);
 285         g_signal_connect(zoomin,  "clicked", G_CALLBACK(on_zoomin ), gui);
 286         g_signal_connect(zoomout, "clicked", G_CALLBACK(on_zoomout), gui);
 287 }
 288
 289
 290 /****************
 291  * GObject code *
 292  ****************/
 293 G_DEFINE_TYPE(AWeatherGui, aweather_gui, G_TYPE_OBJECT);
 294
 295 /* Constructor / destructors */
 296 static void aweather_gui_init(AWeatherGui *gui)
 297 {
 298         //g_message("aweather_gui_init");
 299 }
 300
 301 static GObject *aweather_gui_constructor(GType gtype, guint n_properties,
 302                 GObjectConstructParam *properties)
 303 {
 304         //g_message("aweather_gui_constructor");
 305         GObjectClass *parent_class = G_OBJECT_CLASS(aweather_gui_parent_class);
 306         return  parent_class->constructor(gtype, n_properties, properties);
 307 }
 308
 309 static void aweather_gui_dispose (GObject *gobject)
 310 {
 311         //g_message("aweather_gui_dispose");
 312         AWeatherGui *gui = AWEATHER_GUI(gobject);
 313         g_object_unref(gui->view   );
 314         g_object_unref(gui->builder);
 315         g_object_unref(gui->window );
 316         g_object_unref(gui->tabs   );
 317         g_object_unref(gui->drawing);
 318         G_OBJECT_CLASS(aweather_gui_parent_class)->dispose(gobject);
 319 }
 320
 321 static void aweather_gui_finalize(GObject *gobject)
 322 {
 323         //g_message("aweather_gui_finalize");
 324         G_OBJECT_CLASS(aweather_gui_parent_class)->finalize(gobject);
 325 }
 326
 327 static void aweather_gui_class_init(AWeatherGuiClass *klass)
 328 {
 329         //g_message("aweather_gui_class_init");
 330         GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 331         gobject_class->constructor  = aweather_gui_constructor;
 332         gobject_class->dispose      = aweather_gui_dispose;
 333         gobject_class->finalize     = aweather_gui_finalize;
 334 }
 335
 336 /* Methods */
 337 AWeatherGui *aweather_gui_new()
 338 {
 339         //g_message("aweather_gui_new");
 340         GError *error = NULL;
 341
 342         AWeatherGui *gui = g_object_new(AWEATHER_TYPE_GUI, NULL);
 343
 344         gui->builder = gtk_builder_new();
 345         if (!gtk_builder_add_from_file(gui->builder, DATADIR "/aweather/aweather.xml", &error))
 346                 g_error("Failed to create gtk builder: %s", error->message);
 347         gui->view    = aweather_view_new();
 348         gui->window  = GTK_WINDOW      (gtk_builder_get_object(gui->builder, "window"));
 349         gui->tabs    = GTK_NOTEBOOK    (gtk_builder_get_object(gui->builder, "tabs"));
 350         gui->drawing = GTK_DRAWING_AREA(gtk_builder_get_object(gui->builder, "drawing"));
 351         gtk_builder_connect_signals(gui->builder, NULL);
 352
 353         /* Load components */
 354         toolbar_setup(gui);
 355         site_setup(gui);
 356         time_setup(gui);
 357         opengl_setup(gui);
 358         return gui;
 359 }
 360 AWeatherView *aweather_gui_get_view(AWeatherGui *gui)
 361 {
 362         g_assert(AWEATHER_IS_GUI(gui));
 363         return gui->view;
 364 }
 365 GtkBuilder *aweather_gui_get_builder(AWeatherGui *gui)
 366 {
 367         g_assert(AWEATHER_IS_GUI(gui));
 368         return gui->builder;
 369 }
 370 GtkWidget *aweather_gui_get_widget(AWeatherGui *gui, const gchar *name)
 371 {
 372         g_assert(AWEATHER_IS_GUI(gui));
 373         GObject *widget = gtk_builder_get_object(gui->builder, name);
 374         g_assert(GTK_IS_WIDGET(widget));
 375         return GTK_WIDGET(widget);
 376 }
 377 void aweather_gui_gl_begin(AWeatherGui *gui)
 378 {
 379         g_assert(AWEATHER_IS_GUI(gui));
 380
 381         GtkDrawingArea *drawing    = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
 382         GdkGLContext   *glcontext  = gtk_widget_get_gl_context(GTK_WIDGET(drawing));
 383         GdkGLDrawable  *gldrawable = gtk_widget_get_gl_drawable(GTK_WIDGET(drawing));
 384
 385         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
 386                 g_assert_not_reached();
 387
 388         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 389 }
 390 void aweather_gui_gl_end(AWeatherGui *gui)
 391 {
 392         g_assert(AWEATHER_IS_GUI(gui));
 393         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 394         gdk_gl_drawable_gl_end(gldrawable);
 395 }
 396 void aweather_gui_gl_flush(AWeatherGui *gui)
 397 {
 398         g_assert(AWEATHER_IS_GUI(gui));
 399         GdkGLDrawable *gldrawable = gdk_gl_drawable_get_current();
 400         if (gdk_gl_drawable_is_double_buffered(gldrawable))
 401                 gdk_gl_drawable_swap_buffers(gldrawable);
 402         else
 403                 glFlush();
 404         gdk_gl_drawable_gl_end(gldrawable);
 405 }
 406 //void aweather_gui_register_plugin(AWeatherGui *gui, AWeatherPlugin *plugin);